1.

In the following questions, a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series:Question: 7, 2 = 59; 5, 3 = 28; 9, 1 = 810 ; 2, 1 = 13; 5, 4 = ?

A. 19
B. 9
C. 20
D. 239
Answer» B. 9


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